Class: Caldera::Model::Track

Inherits:
Object
  • Object
show all
Defined in:
lib/caldera/model/track.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ Track 



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# File 'lib/caldera/model/track.rb', line 35

def initialize(data)
  # track_data could maybe use a better name. It's
  # a base64 representation of a binary data representation
  # of a track=
  @track_data = data['track']

  info = data['info']
  @identifier = info['identifier']
  @seekable = info['isSeekable']
  @author = info['author']
  @length = info['length']
  @stream = info['isStream']
  @position = info['position']
  @title = info['title']
  @uri = info['uri']
  @source = info['source']
end

Instance Attribute Details

#author ⇒ Object (readonly) 



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# File 'lib/caldera/model/track.rb', line 18

def author
  @author
end

#identifier ⇒ Object (readonly) 



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# File 'lib/caldera/model/track.rb', line 12

def identifier
  @identifier
end

#length ⇒ Object (readonly) 



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# File 'lib/caldera/model/track.rb', line 21

def length
  @length
end

#position ⇒ Object (readonly) 



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# File 'lib/caldera/model/track.rb', line 27

def position
  @position
end

#seekable ⇒ Object (readonly) 



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# File 'lib/caldera/model/track.rb', line 15

def seekable
  @seekable
end

#stream ⇒ Object (readonly) 



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# File 'lib/caldera/model/track.rb', line 24

def stream
  @stream
end

#title ⇒ Object (readonly) 



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# File 'lib/caldera/model/track.rb', line 30

def title
  @title
end

#track_data ⇒ Object (readonly) 



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# File 'lib/caldera/model/track.rb', line 9

def track_data
  @track_data
end

#uri ⇒ Object (readonly) 



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# File 'lib/caldera/model/track.rb', line 33

def uri
  @uri
end

Class Method Details

.from_b64(b64_data) ⇒ Object

Decode a track from base64 track data.



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# File 'lib/caldera/model/track.rb', line 55

def self.from_b64(b64_data)
  data = Base64.decode64(b64_data)
  flags, version = data.unpack('NC')

  raise 'Unsupported track data' if (flags >> 30) != 1

  # This is gross but it's easier than not doing it
  case version
  when 1
    title, author, length, identifier, is_stream, source = data.unpack('@7Z*xZ*Q>xZ*CxZ*')
    Track.new(
      'track' => b64_data,
      'info' => {
        'title' => title,
        'author' => author,
        'length' => length,
        'identifier' => identifier,
        'isStream' => is_stream == 1,
        'source' => source
      }
    )
  when 2
    title, author, length, identifier, is_stream, uri, source = data.unpack('@7Z*xZ*Q>xZ*CxxZ*xZ*xZ*')
    Track.new(
      'track' => b64_data,
      'info' => {
        'title' => title,
        'author' => author,
        'length' => length,
        'identifier' => identifier,
        'isStream' => is_stream == 1,
        'source' => source,
        'uri' => uri
      }
    )
  else
    raise 'Unsupported track version'
  end
end